Re: switch debounce

Hi,
Pardon the ascii graphics, but here is a starting point for
a Schmitt trigger debounce. The hysteresis of part defines and
upper and lower voltage limit that the input has to exceed before
the output will transition. Some tailoring of the R1,R2,C1 values
may be needed for a specific application.

_V+_
|
X
X 10K R2
X
R1 |
1K | |\ 74HC14 Schmitt trigger

>----XXXXXX----o-o-----| |O------

| |/
=== .1uF C1
|
Gnd

A benefit to the 74xxx14 parts is that you have 5 more
trigger/inverters in the package to use for functions. ie debounce,
inversion, signal cleanup, or buffering.

--- In CAD_CAM_EDM_DRO@egroups.com, Tony Jeffree <tony@j...> wrote:
> At 04:33 17/01/01 +0000, you wrote:
> >Schmitt triggers, anyone?!?
>